/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 * Contains some contributions under the Thrift Software License.
 * Please see doc/old-thrift-license.txt in the Thrift distribution for
 * details.
 */

using System;

namespace Thrift.Transport
{
    public abstract class TTransport
    {
        public abstract bool IsOpen
        {
            get;
        }

        public bool Peek()
        {
            return IsOpen;
        }

        public abstract void Open();

        public abstract void Close();

        public abstract int Read(byte[] buf, int off, int len);

        public int ReadAll(byte[] buf, int off, int len)
        {
            int got = 0;
            int ret = 0;

            while (got < len)
            {
                ret = Read(buf, off + got, len - got);
                if (ret <= 0)
                {
                    throw new TTransportException("Cannot read, Remote side has closed");
                }
                got += ret;
            }

            return got;
        }

        public virtual void Write(byte[] buf)
        {
            Write(buf, 0, buf.Length);
        }

        public abstract void Write(byte[] buf, int off, int len);

        public virtual void Flush()
        {
        }
    }
}